bobde



(No Model.)

HOISTING ENGINE.

Patented@ 1)e1. 6,1881.4

UNITED. STATES PATENT f OFFICE.

EUGENE BORDE, JULES PETIT-LAROCHE, AND EM. LABALETTE, OE

BORDEAUX, FRANCE.

HOlSTlNG-ENGINE.

v SPECIFICATION forming part of Letters Patent No. 250,419, dated December 6, 1881, Application filed April 9, 1881. (No model.) Patentcd in France June 2, 1880.

To all whom it may concern:

Be. it known that we, EUGNE BORDE, JULEs 'PETIT-LAROCHE, and EM LABALETTE, all citizens of the Republic of France, and residing in Bordeaux, France, have invented certain new and useful Improvements in Hoisting- Engines, of which the following is a specification.

This invention relates to a hoisting-engine wherein the load is lifted at one stroke of a piston acted upon by duid-pressure in the cylinder.

The novel features will be set f'orth definitely in the claims.

In the drawings which serve to illustrate our invention, Figure l is a longitudinal vertical mid-section through the cylinder of the engine. Fig. 2 is an enlarged sectional view, designed to illustrate the sluiting-box. Fig. 3 is a transverse mid-section, and Fig. 4 is a sectional plan, of the piston on the line auxin Fig. 3, both on a larger scale than Fig. 1.

Let A represent a cylinder or tube, which is preferably made from sheet metal. To the ends of this tube are flanged collars B. To the collar at one end is secured a closing-cap, C, provided with a stout ring or hook, a, by which the cylinder is suspended when in use, and to the other collar is secured a cap, C', having outer and inner tubular extensions, b, which contain the packing material c, and which, with a gland, d, and screw-cap e, Vform an elongated stuffing-box through which the piston-rod D passes. p

I is the piston, which is shown in section in Fig. 3. This piston is formed of two cup-disks, J J, an interposed packing-disk, K, of rubber or other similar yielding substance, and an axial bolt, p, which connects the three parts of the piston together. l'Ve prefer to employ a ring or yoke, q, to connect the piston-rod with the boltp, so as to form a swivel-connection, whereby the disks may be made to clamp more or less tightly on the rubber; but in some cases the piston-rod might pass through the piston and serve to unite its parts together. This construction of the piston is such that the packing-disk K will be compressed by the weight of the load being lifted, as the downward pressure tends to draw the upper disk down, while the pressure of' the duid below tends to press the lower disk upward, and this pressure from above and below serves to eX- pand the packing against the walls of the cylinder, thus increasing the fluid-tightness of the piston in the same ratio that the pressure is increased.

To enable the iiuid to act directly upon the under side ofthe packing-disk K, we may cut in the upper face of the lower disk an annular recess, s, and bore holes t through the disk and opening into said recess to permit the passage ot' the iuid.

To the lower collar, B, on the cylinder A is attached an inlet-nipple, f, to receive a flexible or other pipe for leading the duid to and into the cylinder, and to admit air to the cylinder above the piston a nipple or outlet,g, must be provided.

It will be understood that our engine is dexibly suspended at its end, and all rotary mechanism in the nature of cranks, shafts, and guides is avoided. The pipe-connections being flexible, it will he seen that perfect freedom of movement is obtained, combined with the minimum of cost for construction and maintenance.

Having thus described our invention, we claiml. The combination, with the cylinder of a Vsingle-acting hoisting-engine and its pistonro'd, ot' the piston I, composed of the disks J J and the interposed yielding disk K, the said piston-rod being connected with the upper d isk through the lower disk, whereby the yielding disk is compressed between the disks, as and for the purposes set forth.

2. The combination, to form a piston for a single-acting hoisting-engine, of the upper and. lower disks, J J, the lower disk having a recess, s, and apertures or perforations t t, the intermediate yielding disk K, the bolt p, and yoke q, all arranged substantially as and for the purposes set forth.

3. The pistou of a hoistingengine, constructed substantially as shown, whereby the pressure of the Weight lifted, in its resistance to the pressure exerted by the fluid, tends to 5 eompress'the piston-packing and expand it latemily against the Walls of the cylinder, substantially as set forth.

In witness whereof We have hereunto signed our names in the presence of two subscribing Witnesses.

E. BORDE. J. PETIT-LAROCHE. EM LABALET'IE. Witnesses:

N. RUITTER, L. GAUss. 

